Re: sbuild on hurd-amd64...

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Hi,

Quoting Johannes Schauer Marin Rodrigues (2026-06-09 11:50:30)
> chown: invalid group: 'root:netdev'
> can't chown /run/network ... (warning).

Maybe the above is part of the problem. The system did not have the netdev
group because the ifupdown postinst script calls:

if [ "$1" =3D configure ]; then
  addgroup --quiet --system netdev || true
fi

The addgroup call will fail with DPKG_ROOT but that failure will be silence=
d by
the "|| true" part at the end and that's why I didn't notice that the group
wasn't created.

Running addgroup is incompatible with DPKG_ROOT and the solution is to swit=
ch
to a different method of adding the netdev group. One solution is to switch=
 to
the sysusers approach and Luca Boccassi already filed a MR against src:ifup=
down
which implements this here:

https://salsa.debian.org/debian/ifupdown/-/merge_requests/31

I have now thrown the ifupdown package into our dpkg-root-demo CI setup to =
make
sure that it creates bit-by-bit identical output with DPKG_ROOT compared to
without DPKG_ROOT. In addition to Luca's patch another small fix is needed =
to
also create /etc/network/interfaces correctly:

https://salsa.debian.org/debian/ifupdown/-/merge_requests/32

I now created the netdev group manually.

Thanks!

cheers, josch
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